Revolving press



A. DE FRIES.

REVOLVING PRESS. APPLICATION FILED 020.22.1919.

1,434,876, Patented Nov. 7, 1 922.

WZYZZEFFE 35- 27 7/1771 de M40 fiw AJMM m M I as the cherry-red headedworking ALFRED DE PATENT ori ice FRIES, or cAssEL, GERMANY.

REVOLVING PRESS.

Application filed December 22, 1919.

To all who met may concern.

Be it known that I, ALFRED DE FRIEs, a citizen ofthe German Republic,residing at Cassel, Germany, have invented certain new and usefulImprovements 1n Revolving Presses (for which I have filed application inGermany June 14, January 30, 1918, and October 18, 1917 of which'thefollowing is a specification.

Hitherto it has been impossible to use presses with a revolving tablefor the manufacture of bolts or rivets with large heads which have to bepressed sharply, such as boiler-rivets or deeply sunk ships-rivets. Oneof the reasons therefor is that such presseshave no device for previousupsetting which is indispensable to prevent the giving way in lateraldirection of the head-iron which is relatively long. Another reason isthat the heading-punch does not work with the speed required for thesharp pressingout of the heads. There exist. however presses withupsetting devices, but such de vices consist of solid punches such asfor example are used in the cold-presses. The solidpunch is not suitablefor hot-pressing pieces get stuck in-this kind of upsetting devicewhereby continuous disorders are caused in their use.

The present invention has for its principal object, to obviate theseinconveniences by the use of a so-called open upsetting device whichopens after every pressing action and further by the increased speed ofthe heading-punch. This increased speed of the heading-punch is renderedpossible by means of an intermediary shaft driven from the main shaft bya gear wheel which regulates the movements of the revolving table incorrect proportion to the speed of the heading punch. Thus it ispossible to run the main shaft which drives the heading-punch with amuch higher speed than hitherto, the speed of the. revolving tableremaining slow. The feeding of the working pieces into the dies can beeffected by hand or automatically. it is however not absolutelynecessary that a feed shaft be used as under certain conditions therevolving table and the gear for the ejector pins could be operated fromthe main shaft.

With the above andother objects in view the invention consists ingeneral of details of construction, illustrated in the accompanyingdrawings and specifically claimed.

Serial No. 346,811.

In the accompanying drawings like characters of reference indicate likeparts in the several views:

Fig. 1 is a partial section of a revolving i press improved according tothe present invention.

Fig. 2 is a section on line A-B of Fig. 1

showing the ejecting and coolingdevices.

The movement of the trolled from the feed shaft 1 by means of a cam disc2-acting through the intermediary of a roller 4k upon a swinging-rod 3.The rod 3 acts upon a pawl and ratchet 5, 6 the ratchet 6 of which iskeyed upon the same shaft as the die-holder 7. At each revolution of'thefeed shaft through of the circle of the die-holder, that is through 459.The movement of the die-holder requires of the time of one revolution ofthe feed shaft 1 the pressing action taking place during the remainingthird.

The heading punch '10, is securedto the carrier 11 which is operated bythe main shaft 14 directly by means of the crank 15 and rod 16.. As forthe die-holder,

die-holder is cona slower speed is required gears 12, 13 are inter 1 thedie 9 is moved i posed between the feed shaft 1 and the main shaft 14.If the ratio of gear of the toothed wheels were, for example, 1:3, thedie gets from the posit-ion 9, to the position 9 during the time inwhich the heading-punch 1O executes three strokes including thepressing. p I v The movement 'of the upsetting punch which consists oftwo parts 17, 18 can be derived either. from the feed shaft 1 or fromthe main shaft 14. According to the drawing the main-shaft 14 is used,the movement being transferred from the crank 32 through the rods 19, 20upon the shaft 21 which carries the arm 22 forthe carrier of theupsetting-punchp This carrier is composed of the main slide 23 and theauxiliary slide 24' between which is a gap 25. The arm 22 engages with aslot 33 of the auxiliary slide12e The carrier is guided in the part 31.The movementv of thecarriage is effected in the following manner: Whenthe auxiliary carriage 24: is moving downwards, owing to. the pressurefrom arm 22,

I it presses upon the main-slide 23 after the the driving arm 22 goesup, the auxiliary I 2 being'th'u's maintained in its posit-ion whilstthe upsetting is being effected. The ge shaped lowerend of the auxlliarycar -i 2 1i penetratesbetween said roller 28 of the lBVGlQG and the backwall of carriage when said auxiliary carrier is moved downwards, theroller 28, respectively the upper end of the lever 26 being thus pushedaway from the main carriage so that the upsetting tool 17, 18 is closed.This device is opened again when the auxiliary carrier 5%; goes up, whenthe roller-.28 is liberated by the part 29 of the auxiliary carrier sothat it can engage'with the'extension 30 of gap 25 through the influenceof a spring or m ely through the expanding of the ma teri al which hasbeen upset. The lever 26 is thus released and the tool 17, 18 can openandliberate the rivet or bolt] I The upsetting means hereinbefore,described and illustrated in the drawing can be used also in connectionwith other presses.

The device illustrated in Fig. 2, which serves for ejecting thepressedbolts from'the di'es' consist of a frame 34: carrying the dieholder 7 inwhich the dies 9 are located. 'ihe ejccting'pins 35 guided in the cylindical extension of the bo'rings for the dies a can swing around providedin the die-holder are submitted to the action of two-armed levers 36.The levers 36 are 'pivotally mounted in a bearing 8 provided in thedie-holder so that they pins 38, slots 39 of said bearing 8 assuring theunimpeded movement oisaid'levers. As can be seen from Fig. 2-, the facese0,41 or 42 of said levers are fully or partly in contact with thewallsof said,

slots. The noses 48 at the inner ends of the levers 36 are located sothat they are adapted to exert a pressure in the direction of the axisofth'e ejecting pins "35. 'The'le'vers 36 are actuated flOfil thefeedshaft 1 bymeans ot a cam lever 50 operated by a cam of said shaftand hingedly connected by a "connectingrod 59 with one end of a bellcrank lever 60 whose other end is connected with a rod 61 in such amanner that this rod exerts a reciprocating movement."

When a pressure isexe'rted upon a pedal 62 therod L5 i's pulled to theleft, whereby anfangle lever 46', 47 is moved out of the way of thecoupling pin 48 which is thus free to engage with a couplingpin of thetoothed wheel '12 whereby the shaft 1 and necessarily also the system ofconnecting of 23 which then rods 5861 is set in motion. As soon as thepedal 62 is released, the different parts return to their normalpositions, shown in Fig. 1 of the drawings so that the arm 4:? of theangle lever 4:6, 47 whereby the shaft- 1 is thrown out of gear and theconnecting rods 58-61 are stopped. The cooling liquid is conductedthrough a channel 37 into an excavation 49 of the die holder 7. Channels50 radiating from said excavation t9 lead to the'screw'stoppers 51.Channels 52, 53 branch off from said channels 50, of'which 53 leads to acylindrical space surrounding the ejector 35, channel 52- leading to anannular space 55 provided around the die 9. When the machine is working,the water or other cooling fluid drops thus out along the die and isthrown out through the mouth 57 ofthe boring of the die owing to thepiston-like action of an annular collar 56 of the ejector pin 35wherebythe perfect cooling of all the parts is obtained;

I claim:

ii In a revolving press with movable die holder'the combination of arotatable die holder, an upsetting tool' composed of a fixed part and ofa movable part adapted to open automatically after each upsetting actionand a heading punch for terminating the head of the article to beproduced.

2,111 a revolving press with movable die holder the combination of amain slide havin'gan excavation in its upper part, a fixed part of anupsetting: tool mounted in said slide, a two-armed leVer'piVO'taIlyfixed at the side of the main slide, the movable part of the upsettingtool fixed in'the lower end of said lever, an auxiliary carrier locatedsaid upsetting tool and a heading punch.

produced.

3. In a 'revolvingpress with movable die holder the, combination of afeed shaft with means for throwing out of action said .feed shaft, anupsetting tool composed of a fixed part and of a movable part adapted toopen automatically upon each upsetting action, heading punchtor-terminating the head of the article to be produced, a set of headforterminating the head, of the article to be ing dies in the movable dieholder and ejector pins located in the heading dies.

4. Ina revolving press of the type described and shown the combinationof a rotatable die holder having a. central boring,

cylinder in said boring having radial slots, two-armed levers pivotallymounted 1n said radial slots and ejector pins actuated by said twoarmedlevers.

In a revolvingpress oif the type described. and shown the combination ofa rotatable die holder having an excavation at gets behind the pin 48,

iso

its centre for the reception of cooling liqchannels, leading the one tothe ejector (le- 10 uid and channels leading from said excavice, theother to the dievation to the dies In testimony whereof I affix mysignature 6. in a revolving press of the type dein presence of tWoWitnesses. r Q 1 a ccrlbeo and shown the comblnatlon of a ALFRED DEFRIES.

rotatable die holder having an excavation at its centre for thereception of cooling \Vitnesses:

liquid channels leading from said excava- WILBY WIRTH, tion twobranch-channels of each of said ADOLF LEMKE.

